The State of Web Development 2010 was released (http://www.webdirections.org/sotw10/).
CodeIgniter gets special mention in “Server-side Technologies” section (http://www.webdirections.org/sotw10/server/). Here’s the quote:
Last year, the PHP framework CodeIgniter from Ellis Labs was mentioned by 1% of respondents. This year, although once again respondents had to include it in a list of “other” frameworks, was mentioned by over 6% of respondents. This puts CodeIgniter only slightly behind Zend, and in fourth place of all libraries. It may be that members of the CodeIgniter community stacked the results, but a little digging doesn’t immediately indicate that this was the case. CodeIgniter has certainly gained increasing attention, and EllisLabs have long had a fanatical community around ExpressionEngine, which it seems is translating to CodeIgniter as well.
I think if CodeIgniter would have been included in the list, it would have beaten Zend.